I'm using a CX7 and testing hairpin queues. The test traffic is entirely IPv4+UDP with distributed SIP,DIP pairs and received packets are u-turned via hairpin in the CX7 (single 400G interface).
I see different performance when I use a pattern of 'eth' versus 'eth/ipv4' in the hairpin flow entry. From testing it seems that specifying just 'eth' is sufficient to invoke RSS and 'eth/ipv4' should be equivalent since the traffic is all ipv4, but I'm getting ~104Gbps for the 'eth' pattern and ~124Gbps for 'eth/ipv4' pattern. Any thoughts on why there is such a performance difference here? thanks tony This is the 'eth' pattern testpmd commands flow create 0 ingress group 0 pattern end actions jump group 1 / end flow create 0 ingress group 1 pattern eth / end actions count / rss queues 6 7 8 9 end / end The testpmd commands for 'eth/ipv4' flow create 0 ingress group 0 pattern end actions jump group 1 / end flow create 0 ingress group 1 pattern eth / ipv4 / end actions count / rss queues 6 7 8 9 end / end This is the testpmd command line... dpdk-testpmd -l8-14 -a81:00.0,dv_flow_en=1 -- -i --nb-cores 6 --rxq 6 --txq 6 --port-topology loop --forward-mode=rxonly --hairpinq 4 --hairpin-mode 0x10 Versions mlnx-ofa_kernel-24.04-OFED.24.04.0.6.6.1.rhel9u4.x86_64 kmod-mlnx-ofa_kernel-24.04-OFED.24.04.0.6.6.1.rhel9u4.x86_64 mlnx-ofa_kernel-devel-24.04-OFED.24.04.0.6.6.1.rhel9u4.x86_64 ofed-scripts-24.04-OFED.24.04.0.6.6.x86_64 DPDK: v24.03
